SwiftUI View minimumFontWidth function and testing code

gistfile1.txt

//
//  ContentView.swift
//  ViewThatfits
//
//  Created by Dan Wood on 1/13/25.
//

import SwiftUI

struct TextCondenser<Content: View>: View {
	@ViewBuilder var content: Content

	var body: some View {
		ViewThatFits {
			content.fontWidth(.standard)		// 0.0 value
			content.fontWidth(.condensed)		// -0.2 value
			content.fontWidth(.compressed)		// -0.3 value
			content.fontWidth(.compressed)		// last resort, fixed size, so container might want to deal with overflow
				.fixedSize()
		}
	}
}

extension View {
	/// Allow font to be `.condensed` a bit, or `.compressed` even further.
	///
	/// Can be used instead of `minimumScaleFactor()` or in conjunction with it, though scaling is applied only if no room after wrapping to multiple lines
	///
	/// - Parameter width: a `Font.width` you allow the font to shrink to. We don't use `.expanded`.
	@inlinable nonisolated public func minimumFontWidth(_ width: Font.Width = .standard) -> some View {
		ViewThatFits {
			self	// start out with standard font width
			if width.value <= Font.Width.condensed.value {
				self.fontWidth(Font.Width.condensed)
				if width.value <= Font.Width.compressed.value {
					self.fontWidth(Font.Width.compressed)
				}
			}
		}
	}
}


struct ViewThatFitsByLayoutDemo: View {
	@State var width: CGFloat = 100
	var body: some View {
		Slider(value: $width, in: 30 ... 500)
			.padding()
		Text("The quick brown fox jumps over the lazy dog")
			.fixedSize()
			.minimumFontWidth(.compressed)
			.frame(width: width)
			.border(.blue)

		Text("The quick brown fox jumps over the lazy dog")
			.fixedSize()
			.minimumScaleFactor(0.5)
			.minimumFontWidth(.compressed)
			.frame(width: width)
			.border(.blue)

		Text("The quick brown fox jumps over the lazy dog")
			.fixedSize()
			.minimumFontWidth(.compressed)
			.minimumScaleFactor(0.5)
		.frame(width: width)
		.border(.blue)

		Text("The quick brown fox jumps over the lazy dog")
			.fixedSize()
			.minimumFontWidth(.condensed)
			.frame(width: width)
			.border(.blue)

		Text("The quick brown fox jumps over the lazy dog")
			.fixedSize()
			.minimumScaleFactor(0.5)
			.minimumFontWidth(.condensed)
			.frame(width: width)
			.border(.blue)

		Text("The quick brown fox jumps over the lazy dog")
			.fixedSize()
			.minimumFontWidth(.condensed)
			.minimumScaleFactor(0.5)
			.frame(width: width)
			.border(.blue)


	}
}

#Preview{
	ViewThatFitsByLayoutDemo()
}

struct ContentView: View {
    var body: some View {
		ViewThatFitsByLayoutDemo()
        .padding()
    }
}